Philtpp lange and ernest lindner



(No Model.)

P. .LANGE & E. LINDNER.

ELECTRIC GLASS CUTTING MACHINE.

Patent ed'May 12, 1885.

ATTORNEYS.

N. PETERS. vnnm-Lnho n hur. Walhillgtcn, D c.

PHILIPP LANGE AND ERNEST LINDNER, OF NEV YORK,

PATENT mice.

ELECTRIC GLASS-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 317,805, dated May 12, 1885.

(No model.)

responding parts in all the figures.

Figure l is a front elevation of one of our improved machines. Fig. 2 is a side eleva' tion of the same,partly in section and part being broken away. F-ig. 3 is a plan view of the same, parts being broken away.

The object of this invention is to facilitate the cutting of glass tubes, globes, and other glass articles.

The invention relates to an electric glass-cutting machine constructed with a platform having tubular sockets and set-screws, and supported by posts having at their upper ends slotted bars to receive adjustable insulated bars, with which are connected thecircuitwires of an electric generator, which are provided with a switch, and are connected with a wire tightened by elbow-levers operated by a treadle connected with the said levers by pivoted bars, the said wire being slackened by a spiral spring, as will be hereinafter fully described, and then claimed.

A represents a platform or table,to the cor- 11ers of which are attached tubularsockets B, to receive posts 0. The sockets B are secured to the posts 0 by set-screws D, so that the table A can be readily adjusted higher or lower, as may be desired.

To the upper ends of the posts 0 are attached cross heads or bars E, which are slotted longitudinally to receive the screws F, by means of which the cross-bars G are secured to the said slotted bars E. The cross-bars G are insulated from their supports by rubber slide in a slot in the middle part of the other cross bar G. To the center of the crossbar G, between the slides J, is attached the upper end of a hanger, K, to the lower end of which are pivoted the angles of two elbowlevers, L. The upper ends of the levers L are slotted to receive pins or screws formed upon or attached to the slides J, so that the said slides can be moved toward or from each other by operating the levers L.

To the lower ends of the levers L are pivoted the upper ends of two connecting-bars, M, the lower ends of which are brought together, and are pivoted to the upper end of a connecting-bar, N. The lower end of the connecting-bar N is hinged to thefoot lever or treadle O, which is hinged to the floor or other suitable support. .Vith this construction, by pressing down upon the treadle O the upper ends of the levers L will be drawn to ward each other, drawing the wire H closely around the glass tube, globe, or other object placed within it.

The lower ends of the connecting-bars M are drawn upward, forcing the upper ends of the levers L apart and loosening the wire H, by a spiral spring, P, the upper end of which is attached to the lower end of the hanger K, and its lower end is attached to the lower end of the said connecting-bars M.

To the binding-post I is secured the end of a conducting-wire, Q, the other end of which is connected with a pole of a battery, a dynamo-electric machine, or other generator, R, of electricity. The other pole of the generator R is connected by a conducting-wire, S, with abinding-post,T,attached to the slotted crossbar G. The conducting-wire S is :made in two parts the adjacent ends of which are connected by a switch, U, so that the electric circuit can be readily closed and opened when desired.

In using the machine the tube or other article to be cut is placed upon the table A, and the wire H is drawn closely around it by pressing the treadle O downward. The switch U is then closed, sending a current of'electricity through the wire H, heating the said wire red hot, and at the same timeheating the part of the glass beneath the said wire. The switch U is then opened and the pressure upon the IOU 2. In an electric glass-cutting machine, the combination, with the insulated cross-bars G and the circuit-Wires Q S of an electric gen- 25 treadle O is removed, loosening the wire H. The tube or other articleis then removed from the tableA and plunged into cold water,which causes the glass to separate where the wire H erator provided with a switch, U, of the wire passed around it. H, the elbow-levers L, the connecting-bars M \Ve have described our improvement as apj N, the treadle O, and the spring 1?, substanplied to round articles of glass, but do not tially as herein shown and described, where. limit ourselves to that application,as it can be I by a wire can be heated by electricity While 30 used with advantage for cutting plates of l in contact with the glass to be cut, assetforth. glass and glass articles of various shapes. 1 3. In an electric glass-cutting machine, the

Having thus described our invention, what 2 combination, with an adjustable table and the we claim as new, and desire to secure by Letinsulated bars G, adjustably supported above ters Patent, is-- the same, of theplatinum wire H, the electric 5 1. In an electric glass-cutting machine, the generator It, circuit-wires Q S, the elbow-lecombination, with a suitable support and inl vers L, connected to the ends of the said platisulated bars supported thereon, of a platinum t nu n1 wire, and means for operating said levers, wire, an electric generator having one pole substantially as herein shown and described. connected to said platinum wire and its other PHILIP]? LANGE.

to one of the insulated bars, and means for ERNEST LINDNER. tightening the said platinum around the object to be cut, substantially as herein shown and described. i

\Vitnesess:

.TAMEs T. GRAHAM, (J. Snnowron. 

